Added basic classes for MapBuilder.
Made a dummy chest builder for the moment.
Removed settings folder from repo
Update ignore file
Proper destructor for MapScreen - Temporary fix for crash bug related to MapScreen
(This screen is likely to be remade anyway)
Added some textures
Added Dummy classes for Assginment 3
Modified some classes to fulfill the map level requirements

Changed some of the CellOccupant operations in Map.
Changed textures
Allow map builder to build map with specified level
Changed a few textures
Merge pull request #9 from Megabyte355/branch-mapbuilder

Branch mapbuilder